<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd" version="1.0.0">
<UserLayer>
 <Name>raster_layer</Name>
    <LayerFeatureConstraints>
       <FeatureTypeConstraint/>
    </LayerFeatureConstraints>
 <UserStyle>
 <Name>raster</Name>
 <Title>A boring default style</Title>
 <Abstract>A sample style for rasters</Abstract>
 <FeatureTypeStyle>
     <FeatureTypeName>Feature</FeatureTypeName>
     <Rule>
          <RasterSymbolizer>
               <Opacity>1.0</Opacity>
               <ChannelSelection>
                   <GrayChannel>
                       <SourceChannelName>1</SourceChannelName>
                   </GrayChannel>
               </ChannelSelection>
          </RasterSymbolizer>
     </Rule>
  </FeatureTypeStyle>
 </UserStyle>
</UserLayer>
</StyledLayerDescriptor>